PHP Math functions

function name	description	instance		output
			number	absolute number
		floating point	into a rounding
		floating point	go directly to the decimal part
	floating point take-up		two floating point   $x > $y	floating-point remainder
	floating point rounding	a number | The number of digits after the decimal point, the default is 0	rounded result
		The number of the prescribed	square root
max ()		Max (Array (2,3,4,5));//5	multiple numbers or an array
min ()		multiple numbers or an array
	better random number	min | max, random number
	random number	min | max, random number
Pi ()	Get the PI value	Pi ();//3.141592653589	No	Get pi

PHP Math functions